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Extend join-selectivity API (oprjoin interface) so that join type is

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passed to join selectivity estimators.  Make use of this in eqjoinsel
to derive non-bogus selectivity for IN clauses.  Further tweaking of
cost estimation for IN.
initdb forced because of pg_proc.h changes.
This commit is contained in:
Tom Lane
2003-01-28 22:13:41 +00:00
parent 955a1f81a7
commit 2e46b762eb
16 changed files with 222 additions and 137 deletions
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8
src/backend/optimizer/path/indxpath.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.133 2003/01/24 03:58:34 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.134 2003/01/28 22:13:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1599,12 +1599,16 @@ make_innerjoin_index_path(Query *root,
* selectivity. However, since RestrictInfo nodes aren't copied when
* linking them into different lists, it should be sufficient to use
* pointer comparison to remove duplicates.)
*
* Always assume the join type is JOIN_INNER; even if some of the
* join clauses come from other contexts, that's not our problem.
*/
pathnode->rows = rel->tuples *
restrictlist_selectivity(root,
set_ptrUnion(rel->baserestrictinfo,
clausegroup),
lfirsti(rel->relids));
lfirsti(rel->relids),
JOIN_INNER);
/* Like costsize.c, force estimate to be at least one row */
if (pathnode->rows < 1.0)
pathnode->rows = 1.0;